Machine driven instruments, are used for opening the canal and for coronal part of the canal treatment. They can be sterilized by hot dry air or autoclaved. The box contains 6 instruments, assorted sizes 1 to 6, or 6 instruments of the same size. Packed in white boxes with white labels, they can be sterilized with hot, dry air at 180 ° C or in a steam autoclave at 135 ° C and disinfected in disinfectant liquids, and washed in ultrasonic cleaners.